// Copyright (C) 2025 Kumo inc.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//

#ifndef ROTHAR_PEGTL_CONTRIB_INTERNAL_PEEK_MASK_UINT8_HPP
#define ROTHAR_PEGTL_CONTRIB_INTERNAL_PEEK_MASK_UINT8_HPP

#include <cstddef>
#include <cstdint>

#include "../../config.hpp"
#include "../../internal/input_pair.hpp"

namespace rothar::internal
{
   template< std::uint8_t M >
   struct peek_mask_uint8
   {
      using data_t = std::uint8_t;
      using pair_t = input_pair< std::uint8_t >;

      template< typename ParseInput >
      [[nodiscard]] static pair_t peek( ParseInput& in ) noexcept( noexcept( in.empty() ) )
      {
         if( in.empty() ) {
            return { 0, 0 };
         }
         return { std::uint8_t( in.peek_uint8() & M ), 1 };
      }
   };

}  // namespace rothar::internal

#endif
